TRENTON, N.J. (AP) — A virus that has been causing severe respiratory illness across the country is responsible for the death of a 4-year-old boy, a state medical examiner determined.
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The virus has sickened more than 500 people in 43 states and Washington, D.C. — almost all of them children.

The U.S. Centers for Disease Control and Prevention said earlier this week that four people infected with the virus had died, but it's unclear what role the virus played in the deaths.
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Children who have not been exposed to forms of enteroviruses may lack immunity to E68, and thus are more susceptible to it.